Compilare: user.cpp: In function ‘int dijkstra()’: user.cpp:64: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bellmanford()’: user.cpp:127: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void citire()’: user.cpp:148: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:149: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:151: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:155: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result